2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle
;
35 struct btrfs_transaction
;
36 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
37 extern struct kmem_cache
*btrfs_transaction_cachep
;
38 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
39 extern struct kmem_cache
*btrfs_path_cachep
;
40 struct btrfs_ordered_sum
;
42 #define BTRFS_MAGIC "_BHRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
46 #define BTRFS_MAX_LEVEL 8
49 * files bigger than this get some pre-flushing when they are added
50 * to the ordered operations list. That way we limit the total
51 * work done by the commit
53 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
79 /* holds checksums of all the data extents */
80 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
82 /* orhpan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
89 /* for space balancing */
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* dummy objectid represents multiple objectids */
101 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
104 * All files have objectids in this range.
106 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
107 #define BTRFS_LAST_FREE_OBJECTID -256ULL
108 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
112 * the device items go into the chunk tree. The key is in the form
113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
115 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
118 * we can actually store much bigger names, but lets not confuse the rest
121 #define BTRFS_NAME_LEN 255
123 /* 32 bytes in various csum fields */
124 #define BTRFS_CSUM_SIZE 32
127 #define BTRFS_CSUM_TYPE_CRC32 0
129 static int btrfs_csum_sizes
[] = { 4, 0 };
131 /* four bytes for CRC32 */
132 #define BTRFS_EMPTY_DIR_SIZE 0
134 #define BTRFS_FT_UNKNOWN 0
135 #define BTRFS_FT_REG_FILE 1
136 #define BTRFS_FT_DIR 2
137 #define BTRFS_FT_CHRDEV 3
138 #define BTRFS_FT_BLKDEV 4
139 #define BTRFS_FT_FIFO 5
140 #define BTRFS_FT_SOCK 6
141 #define BTRFS_FT_SYMLINK 7
142 #define BTRFS_FT_XATTR 8
143 #define BTRFS_FT_MAX 9
146 * the key defines the order in the tree, and so it also defines (optimal)
147 * block layout. objectid corresonds to the inode number. The flags
148 * tells us things about the object, and is a kind of stream selector.
149 * so for a given inode, keys with flags of 1 might refer to the inode
150 * data, flags of 2 may point to file data in the btree and flags == 3
151 * may point to extents.
153 * offset is the starting byte offset for this key in the stream.
155 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
156 * in cpu native order. Otherwise they are identical and their sizes
157 * should be the same (ie both packed)
159 struct btrfs_disk_key
{
163 } __attribute__ ((__packed__
));
169 } __attribute__ ((__packed__
));
171 struct btrfs_mapping_tree
{
172 struct extent_map_tree map_tree
;
175 #define BTRFS_UUID_SIZE 16
176 struct btrfs_dev_item
{
177 /* the internal btrfs device id */
180 /* size of the device */
186 /* optimal io alignment for this device */
189 /* optimal io width for this device */
192 /* minimal io size for this device */
195 /* type and info about this device */
198 /* expected generation for this device */
202 * starting byte of this partition on the device,
203 * to allowr for stripe alignment in the future
207 /* grouping information for allocation decisions */
210 /* seek speed 0-100 where 100 is fastest */
213 /* bandwidth 0-100 where 100 is fastest */
216 /* btrfs generated uuid for this device */
217 u8 uuid
[BTRFS_UUID_SIZE
];
219 /* uuid of FS who owns this device */
220 u8 fsid
[BTRFS_UUID_SIZE
];
221 } __attribute__ ((__packed__
));
223 struct btrfs_stripe
{
226 u8 dev_uuid
[BTRFS_UUID_SIZE
];
227 } __attribute__ ((__packed__
));
230 /* size of this chunk in bytes */
233 /* objectid of the root referencing this chunk */
239 /* optimal io alignment for this chunk */
242 /* optimal io width for this chunk */
245 /* minimal io size for this chunk */
248 /* 2^16 stripes is quite a lot, a second limit is the size of a single
253 /* sub stripes only matter for raid10 */
255 struct btrfs_stripe stripe
;
256 /* additional stripes go here */
257 } __attribute__ ((__packed__
));
259 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
261 BUG_ON(num_stripes
== 0);
262 return sizeof(struct btrfs_chunk
) +
263 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
266 #define BTRFS_FSID_SIZE 16
267 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
270 * every tree block (leaf or node) starts with this header.
272 struct btrfs_header
{
273 /* these first four must match the super block */
274 u8 csum
[BTRFS_CSUM_SIZE
];
275 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
276 __le64 bytenr
; /* which block this node is supposed to live in */
279 /* allowed to be different from the super from here on down */
280 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
285 } __attribute__ ((__packed__
));
287 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
288 sizeof(struct btrfs_header)) / \
289 sizeof(struct btrfs_key_ptr))
290 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
291 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
292 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
293 sizeof(struct btrfs_item) - \
294 sizeof(struct btrfs_file_extent_item))
296 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
299 * this is a very generous portion of the super block, giving us
300 * room to translate 14 chunks with 3 stripes each.
302 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
303 #define BTRFS_LABEL_SIZE 256
306 * the super block basically lists the main trees of the FS
307 * it currently lacks any block count etc etc
309 struct btrfs_super_block
{
310 u8 csum
[BTRFS_CSUM_SIZE
];
311 /* the first 4 fields must match struct btrfs_header */
312 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
313 __le64 bytenr
; /* this block number */
316 /* allowed to be different from the btrfs_header from here own down */
323 /* this will help find the new super based on the log root */
324 __le64 log_root_transid
;
327 __le64 root_dir_objectid
;
333 __le32 sys_chunk_array_size
;
334 __le64 chunk_root_generation
;
336 __le64 compat_ro_flags
;
337 __le64 incompat_flags
;
342 struct btrfs_dev_item dev_item
;
344 char label
[BTRFS_LABEL_SIZE
];
346 /* future expansion */
348 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
349 } __attribute__ ((__packed__
));
352 * Compat flags that we support. If any incompat flags are set other than the
353 * ones specified below then we will fail to mount
355 #define BTRFS_FEATURE_COMPAT_SUPP 0x0
356 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0x0
357 #define BTRFS_FEATURE_INCOMPAT_SUPP 0x0
360 * A leaf is full of items. offset and size tell us where to find
361 * the item in the leaf (relative to the start of the data area)
364 struct btrfs_disk_key key
;
367 } __attribute__ ((__packed__
));
370 * leaves have an item area and a data area:
371 * [item0, item1....itemN] [free space] [dataN...data1, data0]
373 * The data is separate from the items to get the keys closer together
377 struct btrfs_header header
;
378 struct btrfs_item items
[];
379 } __attribute__ ((__packed__
));
382 * all non-leaf blocks are nodes, they hold only keys and pointers to
385 struct btrfs_key_ptr
{
386 struct btrfs_disk_key key
;
389 } __attribute__ ((__packed__
));
392 struct btrfs_header header
;
393 struct btrfs_key_ptr ptrs
[];
394 } __attribute__ ((__packed__
));
397 * btrfs_paths remember the path taken from the root down to the leaf.
398 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
399 * to any other levels that are present.
401 * The slots array records the index of the item or block pointer
402 * used while walking the tree.
405 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
406 int slots
[BTRFS_MAX_LEVEL
];
407 /* if there is real range locking, this locks field will change */
408 int locks
[BTRFS_MAX_LEVEL
];
410 /* keep some upper locks as we walk down */
414 * set by btrfs_split_item, tells search_slot to keep all locks
415 * and to force calls to keep space in the nodes
417 unsigned int search_for_split
:1;
418 unsigned int keep_locks
:1;
419 unsigned int skip_locking
:1;
420 unsigned int leave_spinning
:1;
424 * items in the extent btree are used to record the objectid of the
425 * owner of the block and the number of references
427 struct btrfs_extent_item
{
429 } __attribute__ ((__packed__
));
431 struct btrfs_extent_ref
{
436 } __attribute__ ((__packed__
));
438 /* dev extents record free space on individual devices. The owner
439 * field points back to the chunk allocation mapping tree that allocated
440 * the extent. The chunk tree uuid field is a way to double check the owner
442 struct btrfs_dev_extent
{
444 __le64 chunk_objectid
;
447 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
448 } __attribute__ ((__packed__
));
450 struct btrfs_inode_ref
{
454 } __attribute__ ((__packed__
));
456 struct btrfs_timespec
{
459 } __attribute__ ((__packed__
));
461 enum btrfs_compression_type
{
462 BTRFS_COMPRESS_NONE
= 0,
463 BTRFS_COMPRESS_ZLIB
= 1,
464 BTRFS_COMPRESS_LAST
= 2,
467 struct btrfs_inode_item
{
468 /* nfs style generation number */
470 /* transid that last touched this inode */
482 /* modification sequence number for NFS */
486 * a little future expansion, for more than this we can
487 * just grow the inode item and version it
490 struct btrfs_timespec atime
;
491 struct btrfs_timespec ctime
;
492 struct btrfs_timespec mtime
;
493 struct btrfs_timespec otime
;
494 } __attribute__ ((__packed__
));
496 struct btrfs_dir_log_item
{
498 } __attribute__ ((__packed__
));
500 struct btrfs_dir_item
{
501 struct btrfs_disk_key location
;
506 } __attribute__ ((__packed__
));
508 struct btrfs_root_item
{
509 struct btrfs_inode_item inode
;
515 __le64 last_snapshot
;
518 struct btrfs_disk_key drop_progress
;
521 } __attribute__ ((__packed__
));
524 * this is used for both forward and backward root refs
526 struct btrfs_root_ref
{
530 } __attribute__ ((__packed__
));
532 #define BTRFS_FILE_EXTENT_INLINE 0
533 #define BTRFS_FILE_EXTENT_REG 1
534 #define BTRFS_FILE_EXTENT_PREALLOC 2
536 struct btrfs_file_extent_item
{
538 * transaction id that created this extent
542 * max number of bytes to hold this extent in ram
543 * when we split a compressed extent we can't know how big
544 * each of the resulting pieces will be. So, this is
545 * an upper limit on the size of the extent in ram instead of
551 * 32 bits for the various ways we might encode the data,
552 * including compression and encryption. If any of these
553 * are set to something a given disk format doesn't understand
554 * it is treated like an incompat flag for reading and writing,
559 __le16 other_encoding
; /* spare for later use */
561 /* are we inline data or a real extent? */
565 * disk space consumed by the extent, checksum blocks are included
569 __le64 disk_num_bytes
;
571 * the logical offset in file blocks (no csums)
572 * this extent record is for. This allows a file extent to point
573 * into the middle of an existing extent on disk, sharing it
574 * between two snapshots (useful if some bytes in the middle of the
575 * extent have changed
579 * the logical number of file blocks (no csums included). This
580 * always reflects the size uncompressed and without encoding.
584 } __attribute__ ((__packed__
));
586 struct btrfs_csum_item
{
588 } __attribute__ ((__packed__
));
590 /* different types of block groups (and chunks) */
591 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
592 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
593 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
594 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
595 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
596 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
597 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
599 struct btrfs_block_group_item
{
601 __le64 chunk_objectid
;
603 } __attribute__ ((__packed__
));
605 struct btrfs_space_info
{
608 u64 total_bytes
; /* total bytes in the space */
609 u64 bytes_used
; /* total bytes used on disk */
610 u64 bytes_pinned
; /* total bytes pinned, will be freed when the
611 transaction finishes */
612 u64 bytes_reserved
; /* total bytes the allocator has reserved for
613 current allocations */
614 u64 bytes_readonly
; /* total bytes that are read only */
616 /* delalloc accounting */
617 u64 bytes_delalloc
; /* number of bytes reserved for allocation,
618 this space is not necessarily reserved yet
620 u64 bytes_may_use
; /* number of bytes that may be used for
623 int full
; /* indicates that we cannot allocate any more
624 chunks for this space */
625 int force_alloc
; /* set if we need to force a chunk alloc for
628 struct list_head list
;
630 /* for block groups in our same type */
631 struct list_head block_groups
;
633 struct rw_semaphore groups_sem
;
637 * free clusters are used to claim free space in relatively large chunks,
638 * allowing us to do less seeky writes. They are used for all metadata
639 * allocations and data allocations in ssd mode.
641 struct btrfs_free_cluster
{
643 spinlock_t refill_lock
;
646 /* largest extent in this cluster */
649 /* first extent starting offset */
652 struct btrfs_block_group_cache
*block_group
;
654 * when a cluster is allocated from a block group, we put the
655 * cluster onto a list in the block group so that it can
656 * be freed before the block group is freed.
658 struct list_head block_group_list
;
661 struct btrfs_block_group_cache
{
662 struct btrfs_key key
;
663 struct btrfs_block_group_item item
;
665 struct mutex cache_mutex
;
673 struct btrfs_space_info
*space_info
;
675 /* free space cache stuff */
676 spinlock_t tree_lock
;
677 struct rb_root free_space_bytes
;
678 struct rb_root free_space_offset
;
680 /* block group cache stuff */
681 struct rb_node cache_node
;
683 /* for block groups in the same raid type */
684 struct list_head list
;
689 /* List of struct btrfs_free_clusters for this block group.
690 * Today it will only have one thing on it, but that may change
692 struct list_head cluster_list
;
695 struct btrfs_leaf_ref_tree
{
697 struct list_head list
;
702 struct btrfs_fs_devices
;
703 struct btrfs_fs_info
{
704 u8 fsid
[BTRFS_FSID_SIZE
];
705 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
706 struct btrfs_root
*extent_root
;
707 struct btrfs_root
*tree_root
;
708 struct btrfs_root
*chunk_root
;
709 struct btrfs_root
*dev_root
;
710 struct btrfs_root
*fs_root
;
711 struct btrfs_root
*csum_root
;
713 /* the log root tree is a directory of all the other log roots */
714 struct btrfs_root
*log_root_tree
;
715 struct radix_tree_root fs_roots_radix
;
717 /* block group cache stuff */
718 spinlock_t block_group_cache_lock
;
719 struct rb_root block_group_cache_tree
;
721 struct extent_io_tree pinned_extents
;
723 /* logical->physical extent mapping */
724 struct btrfs_mapping_tree mapping_tree
;
727 u64 last_trans_committed
;
730 * this is updated to the current trans every time a full commit
731 * is required instead of the faster short fsync log commits
733 u64 last_trans_log_full_commit
;
734 u64 open_ioctl_trans
;
735 unsigned long mount_opt
;
739 struct btrfs_transaction
*running_transaction
;
740 wait_queue_head_t transaction_throttle
;
741 wait_queue_head_t transaction_wait
;
742 wait_queue_head_t async_submit_wait
;
744 struct btrfs_super_block super_copy
;
745 struct btrfs_super_block super_for_commit
;
746 struct block_device
*__bdev
;
747 struct super_block
*sb
;
748 struct inode
*btree_inode
;
749 struct backing_dev_info bdi
;
750 struct mutex trans_mutex
;
751 struct mutex tree_log_mutex
;
752 struct mutex transaction_kthread_mutex
;
753 struct mutex cleaner_mutex
;
754 struct mutex chunk_mutex
;
755 struct mutex drop_mutex
;
756 struct mutex volume_mutex
;
757 struct mutex tree_reloc_mutex
;
760 * this protects the ordered operations list only while we are
761 * processing all of the entries on it. This way we make
762 * sure the commit code doesn't find the list temporarily empty
763 * because another function happens to be doing non-waiting preflush
764 * before jumping into the main commit.
766 struct mutex ordered_operations_mutex
;
768 struct list_head trans_list
;
769 struct list_head hashers
;
770 struct list_head dead_roots
;
772 atomic_t nr_async_submits
;
773 atomic_t async_submit_draining
;
774 atomic_t nr_async_bios
;
775 atomic_t async_delalloc_pages
;
778 * this is used by the balancing code to wait for all the pending
781 spinlock_t ordered_extent_lock
;
784 * all of the data=ordered extents pending writeback
785 * these can span multiple transactions and basically include
786 * every dirty data page that isn't from nodatacow
788 struct list_head ordered_extents
;
791 * all of the inodes that have delalloc bytes. It is possible for
792 * this list to be empty even when there is still dirty data=ordered
793 * extents waiting to finish IO.
795 struct list_head delalloc_inodes
;
798 * special rename and truncate targets that must be on disk before
799 * we're allowed to commit. This is basically the ext3 style
802 struct list_head ordered_operations
;
805 * there is a pool of worker threads for checksumming during writes
806 * and a pool for checksumming after reads. This is because readers
807 * can run with FS locks held, and the writers may be waiting for
808 * those locks. We don't want ordering in the pending list to cause
809 * deadlocks, and so the two are serviced separately.
811 * A third pool does submit_bio to avoid deadlocking with the other
814 struct btrfs_workers workers
;
815 struct btrfs_workers delalloc_workers
;
816 struct btrfs_workers endio_workers
;
817 struct btrfs_workers endio_meta_workers
;
818 struct btrfs_workers endio_meta_write_workers
;
819 struct btrfs_workers endio_write_workers
;
820 struct btrfs_workers submit_workers
;
822 * fixup workers take dirty pages that didn't properly go through
823 * the cow mechanism and make them safe to write. It happens
824 * for the sys_munmap function call path
826 struct btrfs_workers fixup_workers
;
827 struct task_struct
*transaction_kthread
;
828 struct task_struct
*cleaner_kthread
;
829 int thread_pool_size
;
831 /* tree relocation relocated fields */
832 struct list_head dead_reloc_roots
;
833 struct btrfs_leaf_ref_tree reloc_ref_tree
;
834 struct btrfs_leaf_ref_tree shared_ref_tree
;
836 struct kobject super_kobj
;
837 struct completion kobj_unregister
;
840 int log_root_recovering
;
842 atomic_t throttle_gen
;
846 /* protected by the delalloc lock, used to keep from writing
847 * metadata until there is a nice batch
849 u64 dirty_metadata_bytes
;
850 struct list_head dirty_cowonly_roots
;
852 struct btrfs_fs_devices
*fs_devices
;
855 * the space_info list is almost entirely read only. It only changes
856 * when we add a new raid type to the FS, and that happens
857 * very rarely. RCU is used to protect it.
859 struct list_head space_info
;
861 spinlock_t delalloc_lock
;
862 spinlock_t new_trans_lock
;
865 /* data_alloc_cluster is only used in ssd mode */
866 struct btrfs_free_cluster data_alloc_cluster
;
868 /* all metadata allocations go through this cluster */
869 struct btrfs_free_cluster meta_alloc_cluster
;
871 spinlock_t ref_cache_lock
;
872 u64 total_ref_cache_size
;
874 u64 avail_data_alloc_bits
;
875 u64 avail_metadata_alloc_bits
;
876 u64 avail_system_alloc_bits
;
877 u64 data_alloc_profile
;
878 u64 metadata_alloc_profile
;
879 u64 system_alloc_profile
;
885 * in ram representation of the tree. extent_root is used for all allocations
886 * and for the extent tree extent_root root.
888 struct btrfs_dirty_root
;
890 struct extent_buffer
*node
;
892 /* the node lock is held while changing the node pointer */
893 spinlock_t node_lock
;
895 struct extent_buffer
*commit_root
;
896 struct btrfs_leaf_ref_tree
*ref_tree
;
897 struct btrfs_leaf_ref_tree ref_tree_struct
;
898 struct btrfs_dirty_root
*dirty_root
;
899 struct btrfs_root
*log_root
;
900 struct btrfs_root
*reloc_root
;
902 struct btrfs_root_item root_item
;
903 struct btrfs_key root_key
;
904 struct btrfs_fs_info
*fs_info
;
905 struct extent_io_tree dirty_log_pages
;
907 struct kobject root_kobj
;
908 struct completion kobj_unregister
;
909 struct mutex objectid_mutex
;
911 struct mutex log_mutex
;
912 wait_queue_head_t log_writer_wait
;
913 wait_queue_head_t log_commit_wait
[2];
914 atomic_t log_writers
;
915 atomic_t log_commit
[2];
916 unsigned long log_transid
;
917 unsigned long log_batch
;
922 /* data allocations are done in sectorsize units */
925 /* node allocations are done in nodesize units */
928 /* leaf allocations are done in leafsize units */
935 u64 last_inode_alloc
;
938 u64 defrag_trans_start
;
939 struct btrfs_key defrag_progress
;
940 struct btrfs_key defrag_max
;
946 /* the dirty list is only used by non-reference counted roots */
947 struct list_head dirty_list
;
949 spinlock_t list_lock
;
950 struct list_head dead_list
;
951 struct list_head orphan_list
;
954 * right now this just gets used so that a root has its own devid
955 * for stat. It may be used for more later
957 struct super_block anon_super
;
962 * inode items have the data typically returned from stat and store other
963 * info about object characteristics. There is one for every file and dir in
966 #define BTRFS_INODE_ITEM_KEY 1
967 #define BTRFS_INODE_REF_KEY 12
968 #define BTRFS_XATTR_ITEM_KEY 24
969 #define BTRFS_ORPHAN_ITEM_KEY 48
970 /* reserve 2-15 close to the inode for later flexibility */
973 * dir items are the name -> inode pointers in a directory. There is one
974 * for every name in a directory.
976 #define BTRFS_DIR_LOG_ITEM_KEY 60
977 #define BTRFS_DIR_LOG_INDEX_KEY 72
978 #define BTRFS_DIR_ITEM_KEY 84
979 #define BTRFS_DIR_INDEX_KEY 96
981 * extent data is for file data
983 #define BTRFS_EXTENT_DATA_KEY 108
986 * extent csums are stored in a separate tree and hold csums for
987 * an entire extent on disk.
989 #define BTRFS_EXTENT_CSUM_KEY 128
992 * root items point to tree roots. There are typically in the root
993 * tree used by the super block to find all the other trees
995 #define BTRFS_ROOT_ITEM_KEY 132
998 * root backrefs tie subvols and snapshots to the directory entries that
1001 #define BTRFS_ROOT_BACKREF_KEY 144
1004 * root refs make a fast index for listing all of the snapshots and
1005 * subvolumes referenced by a given root. They point directly to the
1006 * directory item in the root that references the subvol
1008 #define BTRFS_ROOT_REF_KEY 156
1011 * extent items are in the extent map tree. These record which blocks
1012 * are used, and how many references there are to each block
1014 #define BTRFS_EXTENT_ITEM_KEY 168
1015 #define BTRFS_EXTENT_REF_KEY 180
1018 * block groups give us hints into the extent allocation trees. Which
1019 * blocks are free etc etc
1021 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1023 #define BTRFS_DEV_EXTENT_KEY 204
1024 #define BTRFS_DEV_ITEM_KEY 216
1025 #define BTRFS_CHUNK_ITEM_KEY 228
1028 * string items are for debugging. They just store a short string of
1031 #define BTRFS_STRING_ITEM_KEY 253
1033 #define BTRFS_MOUNT_NODATASUM (1 << 0)
1034 #define BTRFS_MOUNT_NODATACOW (1 << 1)
1035 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
1036 #define BTRFS_MOUNT_SSD (1 << 3)
1037 #define BTRFS_MOUNT_DEGRADED (1 << 4)
1038 #define BTRFS_MOUNT_COMPRESS (1 << 5)
1040 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
1041 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
1042 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
1047 #define BTRFS_INODE_NODATASUM (1 << 0)
1048 #define BTRFS_INODE_NODATACOW (1 << 1)
1049 #define BTRFS_INODE_READONLY (1 << 2)
1050 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1051 #define BTRFS_INODE_PREALLOC (1 << 4)
1052 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
1053 ~BTRFS_INODE_##flag)
1054 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
1056 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
1058 /* some macros to generate set/get funcs for the struct fields. This
1059 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
1062 #define le8_to_cpu(v) (v)
1063 #define cpu_to_le8(v) (v)
1066 #define read_eb_member(eb, ptr, type, member, result) ( \
1067 read_extent_buffer(eb, (char *)(result), \
1068 ((unsigned long)(ptr)) + \
1069 offsetof(type, member), \
1070 sizeof(((type *)0)->member)))
1072 #define write_eb_member(eb, ptr, type, member, result) ( \
1073 write_extent_buffer(eb, (char *)(result), \
1074 ((unsigned long)(ptr)) + \
1075 offsetof(type, member), \
1076 sizeof(((type *)0)->member)))
1078 #ifndef BTRFS_SETGET_FUNCS
1079 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1080 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
1081 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
1084 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1085 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1087 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1088 u##bits res = le##bits##_to_cpu(p->member); \
1089 kunmap_atomic(p, KM_USER0); \
1092 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1095 type *p = kmap_atomic(eb->first_page, KM_USER0); \
1096 p->member = cpu_to_le##bits(val); \
1097 kunmap_atomic(p, KM_USER0); \
1100 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1101 static inline u##bits btrfs_##name(type *s) \
1103 return le##bits##_to_cpu(s->member); \
1105 static inline void btrfs_set_##name(type *s, u##bits val) \
1107 s->member = cpu_to_le##bits(val); \
1110 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
1111 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
1112 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
1113 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
1114 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
1115 BTRFS_SETGET_FUNCS(device_start_offset
, struct btrfs_dev_item
,
1117 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
1118 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
1119 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
1120 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
1121 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
1122 BTRFS_SETGET_FUNCS(device_generation
, struct btrfs_dev_item
, generation
, 64);
1124 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
1125 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
1127 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
1129 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
1131 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
1133 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
1135 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
1136 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
1138 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
1140 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
1142 BTRFS_SETGET_STACK_FUNCS(stack_device_generation
, struct btrfs_dev_item
,
1145 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
1147 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
1150 static inline char *btrfs_device_fsid(struct btrfs_dev_item
*d
)
1152 return (char *)d
+ offsetof(struct btrfs_dev_item
, fsid
);
1155 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
1156 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
1157 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
1158 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
1159 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
1160 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
1161 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
1162 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
1163 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
1164 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
1165 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
1167 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
1169 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
1172 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
1173 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
1174 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
1176 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
1178 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
1180 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
1182 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
1183 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
1185 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
1187 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
1188 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
1190 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1193 unsigned long offset
= (unsigned long)c
;
1194 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1195 offset
+= nr
* sizeof(struct btrfs_stripe
);
1196 return (struct btrfs_stripe
*)offset
;
1199 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1201 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1204 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1205 struct btrfs_chunk
*c
, int nr
)
1207 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1210 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1211 struct btrfs_chunk
*c
, int nr
,
1214 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1217 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1218 struct btrfs_chunk
*c
, int nr
)
1220 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1223 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1224 struct btrfs_chunk
*c
, int nr
,
1227 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1230 /* struct btrfs_block_group_item */
1231 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1233 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1235 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1236 struct btrfs_block_group_item
, chunk_objectid
, 64);
1238 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1239 struct btrfs_block_group_item
, chunk_objectid
, 64);
1240 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1241 struct btrfs_block_group_item
, flags
, 64);
1242 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1243 struct btrfs_block_group_item
, flags
, 64);
1245 /* struct btrfs_inode_ref */
1246 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1247 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1249 /* struct btrfs_inode_item */
1250 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1251 BTRFS_SETGET_FUNCS(inode_sequence
, struct btrfs_inode_item
, sequence
, 64);
1252 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1253 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1254 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1255 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1256 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1257 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1258 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1259 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1260 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1261 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 64);
1263 static inline struct btrfs_timespec
*
1264 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1266 unsigned long ptr
= (unsigned long)inode_item
;
1267 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1268 return (struct btrfs_timespec
*)ptr
;
1271 static inline struct btrfs_timespec
*
1272 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1274 unsigned long ptr
= (unsigned long)inode_item
;
1275 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1276 return (struct btrfs_timespec
*)ptr
;
1279 static inline struct btrfs_timespec
*
1280 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1282 unsigned long ptr
= (unsigned long)inode_item
;
1283 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1284 return (struct btrfs_timespec
*)ptr
;
1287 static inline struct btrfs_timespec
*
1288 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1290 unsigned long ptr
= (unsigned long)inode_item
;
1291 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1292 return (struct btrfs_timespec
*)ptr
;
1295 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1296 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1298 /* struct btrfs_dev_extent */
1299 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1301 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1302 chunk_objectid
, 64);
1303 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1305 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1307 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1309 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1310 return (u8
*)((unsigned long)dev
+ ptr
);
1313 /* struct btrfs_extent_ref */
1314 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1315 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1316 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1317 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1319 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1320 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1322 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1324 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1327 /* struct btrfs_extent_item */
1328 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1329 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1332 /* struct btrfs_node */
1333 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1334 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1336 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1339 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1340 sizeof(struct btrfs_key_ptr
) * nr
;
1341 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1344 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1348 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1349 sizeof(struct btrfs_key_ptr
) * nr
;
1350 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1353 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1356 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1357 sizeof(struct btrfs_key_ptr
) * nr
;
1358 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1361 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1365 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1366 sizeof(struct btrfs_key_ptr
) * nr
;
1367 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1370 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1372 return offsetof(struct btrfs_node
, ptrs
) +
1373 sizeof(struct btrfs_key_ptr
) * nr
;
1376 void btrfs_node_key(struct extent_buffer
*eb
,
1377 struct btrfs_disk_key
*disk_key
, int nr
);
1379 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1380 struct btrfs_disk_key
*disk_key
, int nr
)
1383 ptr
= btrfs_node_key_ptr_offset(nr
);
1384 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1385 struct btrfs_key_ptr
, key
, disk_key
);
1388 /* struct btrfs_item */
1389 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1390 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1392 static inline unsigned long btrfs_item_nr_offset(int nr
)
1394 return offsetof(struct btrfs_leaf
, items
) +
1395 sizeof(struct btrfs_item
) * nr
;
1398 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1401 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1404 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1405 struct btrfs_item
*item
)
1407 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1410 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1412 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1415 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1417 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1420 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1422 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1425 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1426 struct btrfs_disk_key
*disk_key
, int nr
)
1428 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1429 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1432 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1433 struct btrfs_disk_key
*disk_key
, int nr
)
1435 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1436 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1439 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1442 * struct btrfs_root_ref
1444 BTRFS_SETGET_FUNCS(root_ref_dirid
, struct btrfs_root_ref
, dirid
, 64);
1445 BTRFS_SETGET_FUNCS(root_ref_sequence
, struct btrfs_root_ref
, sequence
, 64);
1446 BTRFS_SETGET_FUNCS(root_ref_name_len
, struct btrfs_root_ref
, name_len
, 16);
1448 /* struct btrfs_dir_item */
1449 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1450 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1451 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1452 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1454 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1455 struct btrfs_dir_item
*item
,
1456 struct btrfs_disk_key
*key
)
1458 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1461 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1462 struct btrfs_dir_item
*item
,
1463 struct btrfs_disk_key
*key
)
1465 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1468 /* struct btrfs_disk_key */
1469 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1471 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1472 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1474 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1475 struct btrfs_disk_key
*disk
)
1477 cpu
->offset
= le64_to_cpu(disk
->offset
);
1478 cpu
->type
= disk
->type
;
1479 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1482 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1483 struct btrfs_key
*cpu
)
1485 disk
->offset
= cpu_to_le64(cpu
->offset
);
1486 disk
->type
= cpu
->type
;
1487 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1490 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1491 struct btrfs_key
*key
, int nr
)
1493 struct btrfs_disk_key disk_key
;
1494 btrfs_node_key(eb
, &disk_key
, nr
);
1495 btrfs_disk_key_to_cpu(key
, &disk_key
);
1498 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1499 struct btrfs_key
*key
, int nr
)
1501 struct btrfs_disk_key disk_key
;
1502 btrfs_item_key(eb
, &disk_key
, nr
);
1503 btrfs_disk_key_to_cpu(key
, &disk_key
);
1506 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1507 struct btrfs_dir_item
*item
,
1508 struct btrfs_key
*key
)
1510 struct btrfs_disk_key disk_key
;
1511 btrfs_dir_item_key(eb
, item
, &disk_key
);
1512 btrfs_disk_key_to_cpu(key
, &disk_key
);
1516 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1521 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1526 /* struct btrfs_header */
1527 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1528 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1530 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1531 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1532 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1533 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1535 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1537 return (btrfs_header_flags(eb
) & flag
) == flag
;
1540 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1542 u64 flags
= btrfs_header_flags(eb
);
1543 btrfs_set_header_flags(eb
, flags
| flag
);
1544 return (flags
& flag
) == flag
;
1547 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1549 u64 flags
= btrfs_header_flags(eb
);
1550 btrfs_set_header_flags(eb
, flags
& ~flag
);
1551 return (flags
& flag
) == flag
;
1554 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1556 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1560 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1562 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1566 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1568 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1572 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1574 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1578 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1583 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1588 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1593 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1595 return btrfs_header_level(eb
) == 0;
1598 /* struct btrfs_root_item */
1599 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1601 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1602 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1603 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1605 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1607 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1608 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1609 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1610 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1611 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 64);
1612 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1613 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1614 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot
, struct btrfs_root_item
,
1617 /* struct btrfs_super_block */
1619 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1620 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1621 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1623 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1624 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1625 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1626 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1627 struct btrfs_super_block
, chunk_root_generation
, 64);
1628 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1630 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1632 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1633 chunk_root_level
, 8);
1634 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1636 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid
, struct btrfs_super_block
,
1637 log_root_transid
, 64);
1638 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1640 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1642 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1644 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1646 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1648 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1650 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1652 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1653 root_dir_objectid
, 64);
1654 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1656 BTRFS_SETGET_STACK_FUNCS(super_compat_flags
, struct btrfs_super_block
,
1658 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags
, struct btrfs_super_block
,
1660 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags
, struct btrfs_super_block
,
1661 incompat_flags
, 64);
1662 BTRFS_SETGET_STACK_FUNCS(super_csum_type
, struct btrfs_super_block
,
1665 static inline int btrfs_super_csum_size(struct btrfs_super_block
*s
)
1667 int t
= btrfs_super_csum_type(s
);
1668 BUG_ON(t
>= ARRAY_SIZE(btrfs_csum_sizes
));
1669 return btrfs_csum_sizes
[t
];
1672 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1674 return offsetof(struct btrfs_leaf
, items
);
1677 /* struct btrfs_file_extent_item */
1678 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1680 static inline unsigned long
1681 btrfs_file_extent_inline_start(struct btrfs_file_extent_item
*e
)
1683 unsigned long offset
= (unsigned long)e
;
1684 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1688 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1690 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1693 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1695 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1697 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1698 disk_num_bytes
, 64);
1699 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1701 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1703 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1705 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1707 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1709 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1710 other_encoding
, 16);
1712 /* this returns the number of file bytes represented by the inline item.
1713 * If an item is compressed, this is the uncompressed size
1715 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1716 struct btrfs_file_extent_item
*e
)
1718 return btrfs_file_extent_ram_bytes(eb
, e
);
1722 * this returns the number of bytes used by the item on disk, minus the
1723 * size of any extent headers. If a file is compressed on disk, this is
1724 * the compressed size
1726 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1727 struct btrfs_item
*e
)
1729 unsigned long offset
;
1730 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1731 return btrfs_item_size(eb
, e
) - offset
;
1734 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1736 return sb
->s_fs_info
;
1739 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1740 const char *name
, int len
)
1742 /* if we already have a name just free it */
1745 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1749 memcpy(root
->name
, name
, len
);
1750 root
->name
[len
] = '\0';
1755 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
)
1758 return root
->leafsize
;
1759 return root
->nodesize
;
1762 /* helper function to cast into the data area of the leaf. */
1763 #define btrfs_item_ptr(leaf, slot, type) \
1764 ((type *)(btrfs_leaf_data(leaf) + \
1765 btrfs_item_offset_nr(leaf, slot)))
1767 #define btrfs_item_ptr_offset(leaf, slot) \
1768 ((unsigned long)(btrfs_leaf_data(leaf) + \
1769 btrfs_item_offset_nr(leaf, slot)))
1771 static inline struct dentry
*fdentry(struct file
*file
)
1773 return file
->f_path
.dentry
;
1777 void btrfs_put_block_group(struct btrfs_block_group_cache
*cache
);
1778 int btrfs_run_delayed_refs(struct btrfs_trans_handle
*trans
,
1779 struct btrfs_root
*root
, unsigned long count
);
1780 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1781 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1782 u64 bytenr
, u64 num
, int pin
);
1783 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1784 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1785 int btrfs_cross_ref_exist(struct btrfs_trans_handle
*trans
,
1786 struct btrfs_root
*root
, u64 objectid
, u64 bytenr
);
1787 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1788 struct btrfs_block_group_cache
*btrfs_lookup_block_group(
1789 struct btrfs_fs_info
*info
,
1791 u64
btrfs_find_block_group(struct btrfs_root
*root
,
1792 u64 search_start
, u64 search_hint
, int owner
);
1793 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1794 struct btrfs_root
*root
,
1795 u32 blocksize
, u64 parent
,
1801 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1802 struct btrfs_root
*root
,
1803 u64 bytenr
, u32 blocksize
,
1805 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1806 struct btrfs_root
*root
,
1807 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1808 u64 root_objectid
, u64 ref_generation
,
1809 u64 owner
, u64 empty_size
, u64 hint_byte
,
1810 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1811 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1812 struct btrfs_root
*root
, u64 parent
,
1813 u64 root_objectid
, u64 ref_generation
,
1814 u64 owner
, struct btrfs_key
*ins
);
1815 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1816 struct btrfs_root
*root
, u64 parent
,
1817 u64 root_objectid
, u64 ref_generation
,
1818 u64 owner
, struct btrfs_key
*ins
);
1819 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1820 struct btrfs_root
*root
,
1821 u64 num_bytes
, u64 min_alloc_size
,
1822 u64 empty_size
, u64 hint_byte
,
1823 u64 search_end
, struct btrfs_key
*ins
,
1825 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1826 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1828 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1829 struct extent_buffer
*buf
, u32 nr_extents
);
1830 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1831 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1832 struct extent_buffer
*buf
, int start_slot
, int nr
);
1833 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1834 struct btrfs_root
*root
,
1835 u64 bytenr
, u64 num_bytes
, u64 parent
,
1836 u64 root_objectid
, u64 ref_generation
,
1837 u64 owner_objectid
, int pin
);
1838 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1839 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1840 struct btrfs_root
*root
,
1841 struct extent_io_tree
*unpin
);
1842 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1843 struct btrfs_root
*root
,
1844 u64 bytenr
, u64 num_bytes
, u64 parent
,
1845 u64 root_objectid
, u64 ref_generation
,
1846 u64 owner_objectid
);
1847 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1848 struct btrfs_root
*root
, u64 bytenr
, u64 num_bytes
,
1849 u64 orig_parent
, u64 parent
,
1850 u64 root_objectid
, u64 ref_generation
,
1851 u64 owner_objectid
);
1852 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1853 struct btrfs_root
*root
);
1854 int btrfs_extent_readonly(struct btrfs_root
*root
, u64 bytenr
);
1855 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1856 int btrfs_read_block_groups(struct btrfs_root
*root
);
1857 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1858 struct btrfs_root
*root
, u64 bytes_used
,
1859 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1861 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1862 struct btrfs_root
*root
, u64 group_start
);
1863 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1864 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1865 struct btrfs_root
*root
);
1866 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1867 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1868 struct btrfs_root
*root
,
1869 struct extent_buffer
*buf
, u64 orig_start
);
1870 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1871 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1872 int btrfs_reloc_clone_csums(struct inode
*inode
, u64 file_pos
, u64 len
);
1873 u64
btrfs_reduce_alloc_profile(struct btrfs_root
*root
, u64 flags
);
1874 void btrfs_set_inode_space_info(struct btrfs_root
*root
, struct inode
*ionde
);
1875 void btrfs_clear_space_info_full(struct btrfs_fs_info
*info
);
1877 int btrfs_check_metadata_free_space(struct btrfs_root
*root
);
1878 int btrfs_check_data_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1880 void btrfs_free_reserved_data_space(struct btrfs_root
*root
,
1881 struct inode
*inode
, u64 bytes
);
1882 void btrfs_delalloc_reserve_space(struct btrfs_root
*root
, struct inode
*inode
,
1884 void btrfs_delalloc_free_space(struct btrfs_root
*root
, struct inode
*inode
,
1887 int btrfs_previous_item(struct btrfs_root
*root
,
1888 struct btrfs_path
*path
, u64 min_objectid
,
1890 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1891 struct btrfs_root
*root
,
1892 struct btrfs_key
*node_keys
,
1893 u64
*nodes
, int lowest_level
);
1894 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1895 struct btrfs_root
*root
, struct btrfs_path
*path
,
1896 struct btrfs_key
*new_key
);
1897 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1898 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1899 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1900 struct btrfs_key
*key
, int lowest_level
,
1901 int cache_only
, u64 min_trans
);
1902 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1903 struct btrfs_key
*max_key
,
1904 struct btrfs_path
*path
, int cache_only
,
1906 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1907 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1908 struct extent_buffer
*parent
, int parent_slot
,
1909 struct extent_buffer
**cow_ret
);
1910 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1911 struct btrfs_root
*root
,
1912 struct extent_buffer
*buf
,
1913 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1914 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1915 *root
, struct btrfs_path
*path
, u32 data_size
);
1916 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1917 struct btrfs_root
*root
,
1918 struct btrfs_path
*path
,
1919 u32 new_size
, int from_end
);
1920 int btrfs_split_item(struct btrfs_trans_handle
*trans
,
1921 struct btrfs_root
*root
,
1922 struct btrfs_path
*path
,
1923 struct btrfs_key
*new_key
,
1924 unsigned long split_offset
);
1925 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1926 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1928 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1929 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1930 int start_slot
, int cache_only
, u64
*last_ret
,
1931 struct btrfs_key
*progress
);
1932 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1933 struct btrfs_path
*btrfs_alloc_path(void);
1934 void btrfs_free_path(struct btrfs_path
*p
);
1935 void btrfs_set_path_blocking(struct btrfs_path
*p
);
1936 void btrfs_unlock_up_safe(struct btrfs_path
*p
, int level
);
1938 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1939 struct btrfs_path
*path
, int slot
, int nr
);
1940 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1941 struct btrfs_root
*root
,
1942 struct btrfs_path
*path
, u64 bytenr
);
1943 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1944 struct btrfs_root
*root
,
1945 struct btrfs_path
*path
)
1947 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1950 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1951 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1952 int btrfs_insert_some_items(struct btrfs_trans_handle
*trans
,
1953 struct btrfs_root
*root
,
1954 struct btrfs_path
*path
,
1955 struct btrfs_key
*cpu_key
, u32
*data_size
,
1957 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1958 struct btrfs_root
*root
,
1959 struct btrfs_path
*path
,
1960 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1962 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1963 struct btrfs_root
*root
,
1964 struct btrfs_path
*path
,
1965 struct btrfs_key
*key
,
1968 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1971 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1972 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1973 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1974 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1976 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1977 struct btrfs_root
*root
,
1978 struct extent_buffer
*node
,
1979 struct extent_buffer
*parent
);
1981 int btrfs_find_root_ref(struct btrfs_root
*tree_root
,
1982 struct btrfs_path
*path
,
1983 u64 root_id
, u64 ref_id
);
1984 int btrfs_add_root_ref(struct btrfs_trans_handle
*trans
,
1985 struct btrfs_root
*tree_root
,
1986 u64 root_id
, u8 type
, u64 ref_id
,
1987 u64 dirid
, u64 sequence
,
1988 const char *name
, int name_len
);
1989 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1990 struct btrfs_key
*key
);
1991 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1992 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1994 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1995 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1997 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1998 btrfs_root_item
*item
, struct btrfs_key
*key
);
1999 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
2000 u64
*found_objectid
);
2001 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
2002 struct btrfs_root
*latest_root
);
2004 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
,
2005 struct btrfs_root
*root
, const char *name
,
2006 int name_len
, u64 dir
,
2007 struct btrfs_key
*location
, u8 type
, u64 index
);
2008 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
2009 struct btrfs_root
*root
,
2010 struct btrfs_path
*path
, u64 dir
,
2011 const char *name
, int name_len
,
2013 struct btrfs_dir_item
*
2014 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
2015 struct btrfs_root
*root
,
2016 struct btrfs_path
*path
, u64 dir
,
2017 u64 objectid
, const char *name
, int name_len
,
2019 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
2020 struct btrfs_path
*path
,
2021 const char *name
, int name_len
);
2022 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
2023 struct btrfs_root
*root
,
2024 struct btrfs_path
*path
,
2025 struct btrfs_dir_item
*di
);
2026 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
2027 struct btrfs_root
*root
, const char *name
,
2028 u16 name_len
, const void *data
, u16 data_len
,
2030 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
2031 struct btrfs_root
*root
,
2032 struct btrfs_path
*path
, u64 dir
,
2033 const char *name
, u16 name_len
,
2037 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
2038 struct btrfs_root
*root
, u64 offset
);
2039 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
2040 struct btrfs_root
*root
, u64 offset
);
2043 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
2044 struct btrfs_root
*fs_root
,
2045 u64 dirid
, u64
*objectid
);
2046 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
2049 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
2050 struct btrfs_root
*root
,
2051 const char *name
, int name_len
,
2052 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
2053 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
2054 struct btrfs_root
*root
,
2055 const char *name
, int name_len
,
2056 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
2057 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
2058 struct btrfs_root
*root
,
2059 struct btrfs_path
*path
, u64 objectid
);
2060 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
2061 *root
, struct btrfs_path
*path
,
2062 struct btrfs_key
*location
, int mod
);
2065 int btrfs_del_csums(struct btrfs_trans_handle
*trans
,
2066 struct btrfs_root
*root
, u64 bytenr
, u64 len
);
2067 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
2068 struct bio
*bio
, u32
*dst
);
2069 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
2070 struct btrfs_root
*root
,
2071 u64 objectid
, u64 pos
,
2072 u64 disk_offset
, u64 disk_num_bytes
,
2073 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
2074 u8 compression
, u8 encryption
, u16 other_encoding
);
2075 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
2076 struct btrfs_root
*root
,
2077 struct btrfs_path
*path
, u64 objectid
,
2078 u64 bytenr
, int mod
);
2079 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
2080 struct btrfs_root
*root
,
2081 struct btrfs_ordered_sum
*sums
);
2082 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
2083 struct bio
*bio
, u64 file_start
, int contig
);
2084 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
2085 u64 start
, unsigned long len
);
2086 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
2087 struct btrfs_root
*root
,
2088 struct btrfs_path
*path
,
2089 u64 bytenr
, int cow
);
2090 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
2091 struct btrfs_root
*root
, struct btrfs_path
*path
,
2093 int btrfs_lookup_csums_range(struct btrfs_root
*root
, u64 start
,
2094 u64 end
, struct list_head
*list
);
2097 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2098 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2099 #define ClearPageChecked ClearPageFsMisc
2100 #define SetPageChecked SetPageFsMisc
2101 #define PageChecked PageFsMisc
2104 struct inode
*btrfs_lookup_dentry(struct inode
*dir
, struct dentry
*dentry
);
2105 int btrfs_set_inode_index(struct inode
*dir
, u64
*index
);
2106 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
2107 struct btrfs_root
*root
,
2108 struct inode
*dir
, struct inode
*inode
,
2109 const char *name
, int name_len
);
2110 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
2111 struct inode
*parent_inode
, struct inode
*inode
,
2112 const char *name
, int name_len
, int add_backref
, u64 index
);
2113 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
2114 struct btrfs_root
*root
,
2115 struct inode
*inode
, u64 new_size
,
2118 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
2119 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
2120 int btrfs_writepages(struct address_space
*mapping
,
2121 struct writeback_control
*wbc
);
2122 int btrfs_create_subvol_root(struct btrfs_trans_handle
*trans
,
2123 struct btrfs_root
*new_root
, struct dentry
*dentry
,
2124 u64 new_dirid
, u64 alloc_hint
);
2125 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
2126 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
2128 unsigned long btrfs_force_ra(struct address_space
*mapping
,
2129 struct file_ra_state
*ra
, struct file
*file
,
2130 pgoff_t offset
, pgoff_t last_index
);
2131 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
2132 int btrfs_readpage(struct file
*file
, struct page
*page
);
2133 void btrfs_delete_inode(struct inode
*inode
);
2134 void btrfs_put_inode(struct inode
*inode
);
2135 void btrfs_read_locked_inode(struct inode
*inode
);
2136 int btrfs_write_inode(struct inode
*inode
, int wait
);
2137 void btrfs_dirty_inode(struct inode
*inode
);
2138 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
2139 void btrfs_destroy_inode(struct inode
*inode
);
2140 int btrfs_init_cachep(void);
2141 void btrfs_destroy_cachep(void);
2142 long btrfs_ioctl_trans_end(struct file
*file
);
2143 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
2144 struct btrfs_root
*root
, int wait
);
2145 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
2146 struct btrfs_root
*root
);
2147 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
2148 struct btrfs_root
*root
, int *is_new
);
2149 int btrfs_commit_write(struct file
*file
, struct page
*page
,
2150 unsigned from
, unsigned to
);
2151 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
2152 size_t page_offset
, u64 start
, u64 end
,
2154 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
2155 struct btrfs_root
*root
,
2156 struct inode
*inode
);
2157 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2158 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
2159 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
2160 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
2163 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
2166 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
2167 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
2169 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
2170 extern struct file_operations btrfs_file_operations
;
2171 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
2172 struct btrfs_root
*root
, struct inode
*inode
,
2173 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
2174 int btrfs_mark_extent_written(struct btrfs_trans_handle
*trans
,
2175 struct btrfs_root
*root
,
2176 struct inode
*inode
, u64 start
, u64 end
);
2177 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
2180 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
2181 struct btrfs_root
*root
, int cache_only
);
2184 int btrfs_init_sysfs(void);
2185 void btrfs_exit_sysfs(void);
2186 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
2187 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
2188 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
2189 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
2192 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
2195 u64
btrfs_parse_size(char *str
);
2196 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
2197 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
2200 int btrfs_check_acl(struct inode
*inode
, int mask
);
2201 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
2202 int btrfs_acl_chmod(struct inode
*inode
);